1 // SPDX-License-Identifier: GPL-2.0-only
5 * Builtin stat command: Give a precise performance counters summary
6 * overview about any workload, CPU or specific PID.
10 $ perf stat ./hackbench 10
14 Performance counter stats for './hackbench 10':
16 1708.761321 task-clock # 11.037 CPUs utilized
17 41,190 context-switches # 0.024 M/sec
18 6,735 CPU-migrations # 0.004 M/sec
19 17,318 page-faults # 0.010 M/sec
20 5,205,202,243 cycles # 3.046 GHz
21 3,856,436,920 stalled-cycles-frontend # 74.09% frontend cycles idle
22 1,600,790,871 stalled-cycles-backend # 30.75% backend cycles idle
23 2,603,501,247 instructions # 0.50 insns per cycle
24 # 1.48 stalled cycles per insn
25 484,357,498 branches # 283.455 M/sec
26 6,388,934 branch-misses # 1.32% of all branches
28 0.154822978 seconds time elapsed
31 * Copyright (C) 2008-2011, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
33 * Improvements and fixes by:
35 * Arjan van de Ven <arjan@linux.intel.com>
36 * Yanmin Zhang <yanmin.zhang@intel.com>
37 * Wu Fengguang <fengguang.wu@intel.com>
38 * Mike Galbraith <efault@gmx.de>
39 * Paul Mackerras <paulus@samba.org>
40 * Jaswinder Singh Rajput <jaswinder@kernel.org>
45 #include "util/cgroup.h"
46 #include "util/util.h"
47 #include <subcmd/parse-options.h>
48 #include "util/parse-events.h"
50 #include "util/event.h"
51 #include "util/evlist.h"
52 #include "util/evsel.h"
53 #include "util/debug.h"
54 #include "util/color.h"
55 #include "util/stat.h"
56 #include "util/header.h"
57 #include "util/cpumap.h"
58 #include "util/thread.h"
59 #include "util/thread_map.h"
60 #include "util/counts.h"
61 #include "util/group.h"
62 #include "util/session.h"
63 #include "util/tool.h"
64 #include "util/string2.h"
65 #include "util/metricgroup.h"
69 #include <linux/time64.h>
70 #include <api/fs/fs.h>
74 #include <sys/prctl.h>
78 #include <sys/types.h>
83 #include <sys/resource.h>
85 #include "sane_ctype.h"
87 #define DEFAULT_SEPARATOR " "
88 #define FREEZE_ON_SMI_PATH "devices/cpu/freeze_on_smi"
90 static void print_counters(struct timespec *ts, int argc, const char **argv);
92 /* Default events used for perf stat -T */
93 static const char *transaction_attrs = {
105 /* More limited version when the CPU does not have all events. */
106 static const char * transaction_limited_attrs = {
116 static const char * topdown_attrs[] = {
117 "topdown-total-slots",
118 "topdown-slots-retired",
119 "topdown-recovery-bubbles",
120 "topdown-fetch-bubbles",
121 "topdown-slots-issued",
125 static const char *smi_cost_attrs = {
133 static struct perf_evlist *evsel_list;
135 static struct target target = {
139 #define METRIC_ONLY_LEN 20
141 static volatile pid_t child_pid = -1;
142 static int detailed_run = 0;
143 static bool transaction_run;
144 static bool topdown_run = false;
145 static bool smi_cost = false;
146 static bool smi_reset = false;
147 static int big_num_opt = -1;
148 static bool group = false;
149 static const char *pre_cmd = NULL;
150 static const char *post_cmd = NULL;
151 static bool sync_run = false;
152 static bool forever = false;
153 static bool force_metric_only = false;
154 static struct timespec ref_time;
155 static bool append_file;
156 static bool interval_count;
157 static const char *output_name;
158 static int output_fd;
162 struct perf_data data;
163 struct perf_session *session;
165 struct perf_tool tool;
167 struct cpu_map *cpus;
168 struct thread_map *threads;
169 enum aggr_mode aggr_mode;
172 static struct perf_stat perf_stat;
173 #define STAT_RECORD perf_stat.record
175 static volatile int done = 0;
177 static struct perf_stat_config stat_config = {
178 .aggr_mode = AGGR_GLOBAL,
180 .unit_width = 4, /* strlen("unit") */
182 .metric_only_len = METRIC_ONLY_LEN,
183 .walltime_nsecs_stats = &walltime_nsecs_stats,
187 static inline void diff_timespec(struct timespec *r, struct timespec *a,
190 r->tv_sec = a->tv_sec - b->tv_sec;
191 if (a->tv_nsec < b->tv_nsec) {
192 r->tv_nsec = a->tv_nsec + NSEC_PER_SEC - b->tv_nsec;
195 r->tv_nsec = a->tv_nsec - b->tv_nsec ;
199 static void perf_stat__reset_stats(void)
203 perf_evlist__reset_stats(evsel_list);
204 perf_stat__reset_shadow_stats();
206 for (i = 0; i < stat_config.stats_num; i++)
207 perf_stat__reset_shadow_per_stat(&stat_config.stats[i]);
210 static int process_synthesized_event(struct perf_tool *tool __maybe_unused,
211 union perf_event *event,
212 struct perf_sample *sample __maybe_unused,
213 struct machine *machine __maybe_unused)
215 if (perf_data__write(&perf_stat.data, event, event->header.size) < 0) {
216 pr_err("failed to write perf data, error: %m\n");
220 perf_stat.bytes_written += event->header.size;
224 static int write_stat_round_event(u64 tm, u64 type)
226 return perf_event__synthesize_stat_round(NULL, tm, type,
227 process_synthesized_event,
231 #define WRITE_STAT_ROUND_EVENT(time, interval) \
232 write_stat_round_event(time, PERF_STAT_ROUND_TYPE__ ## interval)
234 #define SID(e, x, y) xyarray__entry(e->sample_id, x, y)
237 perf_evsel__write_stat_event(struct perf_evsel *counter, u32 cpu, u32 thread,
238 struct perf_counts_values *count)
240 struct perf_sample_id *sid = SID(counter, cpu, thread);
242 return perf_event__synthesize_stat(NULL, cpu, thread, sid->id, count,
243 process_synthesized_event, NULL);
246 static int read_single_counter(struct perf_evsel *counter, int cpu,
247 int thread, struct timespec *rs)
249 if (counter->tool_event == PERF_TOOL_DURATION_TIME) {
250 u64 val = rs->tv_nsec + rs->tv_sec*1000000000ULL;
251 struct perf_counts_values *count =
252 perf_counts(counter->counts, cpu, thread);
253 count->ena = count->run = val;
257 return perf_evsel__read_counter(counter, cpu, thread);
261 * Read out the results of a single counter:
262 * do not aggregate counts across CPUs in system-wide mode
264 static int read_counter(struct perf_evsel *counter, struct timespec *rs)
266 int nthreads = thread_map__nr(evsel_list->threads);
267 int ncpus, cpu, thread;
269 if (target__has_cpu(&target) && !target__has_per_thread(&target))
270 ncpus = perf_evsel__nr_cpus(counter);
274 if (!counter->supported)
277 if (counter->system_wide)
280 for (thread = 0; thread < nthreads; thread++) {
281 for (cpu = 0; cpu < ncpus; cpu++) {
282 struct perf_counts_values *count;
284 count = perf_counts(counter->counts, cpu, thread);
287 * The leader's group read loads data into its group members
288 * (via perf_evsel__read_counter) and sets threir count->loaded.
290 if (!count->loaded &&
291 read_single_counter(counter, cpu, thread, rs)) {
292 counter->counts->scaled = -1;
293 perf_counts(counter->counts, cpu, thread)->ena = 0;
294 perf_counts(counter->counts, cpu, thread)->run = 0;
298 count->loaded = false;
301 if (perf_evsel__write_stat_event(counter, cpu, thread, count)) {
302 pr_err("failed to write stat event\n");
308 fprintf(stat_config.output,
309 "%s: %d: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
310 perf_evsel__name(counter),
312 count->val, count->ena, count->run);
320 static void read_counters(struct timespec *rs)
322 struct perf_evsel *counter;
325 evlist__for_each_entry(evsel_list, counter) {
326 ret = read_counter(counter, rs);
328 pr_debug("failed to read counter %s\n", counter->name);
330 if (ret == 0 && perf_stat_process_counter(&stat_config, counter))
331 pr_warning("failed to process counter %s\n", counter->name);
335 static void process_interval(void)
337 struct timespec ts, rs;
339 clock_gettime(CLOCK_MONOTONIC, &ts);
340 diff_timespec(&rs, &ts, &ref_time);
345 if (WRITE_STAT_ROUND_EVENT(rs.tv_sec * NSEC_PER_SEC + rs.tv_nsec, INTERVAL))
346 pr_err("failed to write stat round event\n");
349 init_stats(&walltime_nsecs_stats);
350 update_stats(&walltime_nsecs_stats, stat_config.interval * 1000000);
351 print_counters(&rs, 0, NULL);
354 static void enable_counters(void)
356 if (stat_config.initial_delay)
357 usleep(stat_config.initial_delay * USEC_PER_MSEC);
360 * We need to enable counters only if:
361 * - we don't have tracee (attaching to task or cpu)
362 * - we have initial delay configured
364 if (!target__none(&target) || stat_config.initial_delay)
365 perf_evlist__enable(evsel_list);
368 static void disable_counters(void)
371 * If we don't have tracee (attaching to task or cpu), counters may
372 * still be running. To get accurate group ratios, we must stop groups
373 * from counting before reading their constituent counters.
375 if (!target__none(&target))
376 perf_evlist__disable(evsel_list);
379 static volatile int workload_exec_errno;
382 * perf_evlist__prepare_workload will send a SIGUSR1
383 * if the fork fails, since we asked by setting its
384 * want_signal to true.
386 static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info,
387 void *ucontext __maybe_unused)
389 workload_exec_errno = info->si_value.sival_int;
392 static bool perf_evsel__should_store_id(struct perf_evsel *counter)
394 return STAT_RECORD || counter->attr.read_format & PERF_FORMAT_ID;
397 static bool is_target_alive(struct target *_target,
398 struct thread_map *threads)
403 if (!target__has_task(_target))
406 for (i = 0; i < threads->nr; i++) {
409 scnprintf(path, PATH_MAX, "%s/%d", procfs__mountpoint(),
410 threads->map[i].pid);
412 if (!stat(path, &st))
419 static int __run_perf_stat(int argc, const char **argv, int run_idx)
421 int interval = stat_config.interval;
422 int times = stat_config.times;
423 int timeout = stat_config.timeout;
425 unsigned long long t0, t1;
426 struct perf_evsel *counter;
430 const bool forks = (argc > 0);
431 bool is_pipe = STAT_RECORD ? perf_stat.data.is_pipe : false;
434 ts.tv_sec = interval / USEC_PER_MSEC;
435 ts.tv_nsec = (interval % USEC_PER_MSEC) * NSEC_PER_MSEC;
436 } else if (timeout) {
437 ts.tv_sec = timeout / USEC_PER_MSEC;
438 ts.tv_nsec = (timeout % USEC_PER_MSEC) * NSEC_PER_MSEC;
445 if (perf_evlist__prepare_workload(evsel_list, &target, argv, is_pipe,
446 workload_exec_failed_signal) < 0) {
447 perror("failed to prepare workload");
450 child_pid = evsel_list->workload.pid;
454 perf_evlist__set_leader(evsel_list);
456 evlist__for_each_entry(evsel_list, counter) {
458 if (create_perf_stat_counter(counter, &stat_config, &target) < 0) {
460 /* Weak group failed. Reset the group. */
461 if ((errno == EINVAL || errno == EBADF) &&
462 counter->leader != counter &&
463 counter->weak_group) {
464 counter = perf_evlist__reset_weak_group(evsel_list, counter);
469 * PPC returns ENXIO for HW counters until 2.6.37
470 * (behavior changed with commit b0a873e).
472 if (errno == EINVAL || errno == ENOSYS ||
473 errno == ENOENT || errno == EOPNOTSUPP ||
476 ui__warning("%s event is not supported by the kernel.\n",
477 perf_evsel__name(counter));
478 counter->supported = false;
480 if ((counter->leader != counter) ||
481 !(counter->leader->nr_members > 1))
483 } else if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) {
485 ui__warning("%s\n", msg);
487 } else if (target__has_per_thread(&target) &&
488 evsel_list->threads &&
489 evsel_list->threads->err_thread != -1) {
491 * For global --per-thread case, skip current
494 if (!thread_map__remove(evsel_list->threads,
495 evsel_list->threads->err_thread)) {
496 evsel_list->threads->err_thread = -1;
501 perf_evsel__open_strerror(counter, &target,
502 errno, msg, sizeof(msg));
503 ui__error("%s\n", msg);
506 kill(child_pid, SIGTERM);
510 counter->supported = true;
512 l = strlen(counter->unit);
513 if (l > stat_config.unit_width)
514 stat_config.unit_width = l;
516 if (perf_evsel__should_store_id(counter) &&
517 perf_evsel__store_ids(counter, evsel_list))
521 if (perf_evlist__apply_filters(evsel_list, &counter)) {
522 pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n",
523 counter->filter, perf_evsel__name(counter), errno,
524 str_error_r(errno, msg, sizeof(msg)));
529 int err, fd = perf_data__fd(&perf_stat.data);
532 err = perf_header__write_pipe(perf_data__fd(&perf_stat.data));
534 err = perf_session__write_header(perf_stat.session, evsel_list,
541 err = perf_stat_synthesize_config(&stat_config, NULL, evsel_list,
542 process_synthesized_event, is_pipe);
548 * Enable counters and exec the command:
551 clock_gettime(CLOCK_MONOTONIC, &ref_time);
554 perf_evlist__start_workload(evsel_list);
557 if (interval || timeout) {
558 while (!waitpid(child_pid, &status, WNOHANG)) {
559 nanosleep(&ts, NULL);
563 if (interval_count && !(--times))
568 wait4(child_pid, &status, 0, &stat_config.ru_data);
570 if (workload_exec_errno) {
571 const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg));
572 pr_err("Workload failed: %s\n", emsg);
576 if (WIFSIGNALED(status))
577 psignal(WTERMSIG(status), argv[0]);
581 nanosleep(&ts, NULL);
582 if (!is_target_alive(&target, evsel_list->threads))
588 if (interval_count && !(--times))
598 if (stat_config.walltime_run_table)
599 stat_config.walltime_run[run_idx] = t1 - t0;
601 update_stats(&walltime_nsecs_stats, t1 - t0);
604 * Closing a group leader splits the group, and as we only disable
605 * group leaders, results in remaining events becoming enabled. To
606 * avoid arbitrary skew, we must read all counters before closing any
609 read_counters(&(struct timespec) { .tv_nsec = t1-t0 });
610 perf_evlist__close(evsel_list);
612 return WEXITSTATUS(status);
615 static int run_perf_stat(int argc, const char **argv, int run_idx)
620 ret = system(pre_cmd);
628 ret = __run_perf_stat(argc, argv, run_idx);
633 ret = system(post_cmd);
641 static void print_counters(struct timespec *ts, int argc, const char **argv)
643 /* Do not print anything if we record to the pipe. */
644 if (STAT_RECORD && perf_stat.data.is_pipe)
647 perf_evlist__print_counters(evsel_list, &stat_config, &target,
651 static volatile int signr = -1;
653 static void skip_signal(int signo)
655 if ((child_pid == -1) || stat_config.interval)
660 * render child_pid harmless
661 * won't send SIGTERM to a random
662 * process in case of race condition
663 * and fast PID recycling
668 static void sig_atexit(void)
673 * avoid race condition with SIGCHLD handler
674 * in skip_signal() which is modifying child_pid
675 * goal is to avoid send SIGTERM to a random
679 sigaddset(&set, SIGCHLD);
680 sigprocmask(SIG_BLOCK, &set, &oset);
683 kill(child_pid, SIGTERM);
685 sigprocmask(SIG_SETMASK, &oset, NULL);
690 signal(signr, SIG_DFL);
691 kill(getpid(), signr);
694 static int stat__set_big_num(const struct option *opt __maybe_unused,
695 const char *s __maybe_unused, int unset)
697 big_num_opt = unset ? 0 : 1;
701 static int enable_metric_only(const struct option *opt __maybe_unused,
702 const char *s __maybe_unused, int unset)
704 force_metric_only = true;
705 stat_config.metric_only = !unset;
709 static int parse_metric_groups(const struct option *opt,
711 int unset __maybe_unused)
713 return metricgroup__parse_groups(opt, str, &stat_config.metric_events);
716 static struct option stat_options[] = {
717 OPT_BOOLEAN('T', "transaction", &transaction_run,
718 "hardware transaction statistics"),
719 OPT_CALLBACK('e', "event", &evsel_list, "event",
720 "event selector. use 'perf list' to list available events",
721 parse_events_option),
722 OPT_CALLBACK(0, "filter", &evsel_list, "filter",
723 "event filter", parse_filter),
724 OPT_BOOLEAN('i', "no-inherit", &stat_config.no_inherit,
725 "child tasks do not inherit counters"),
726 OPT_STRING('p', "pid", &target.pid, "pid",
727 "stat events on existing process id"),
728 OPT_STRING('t', "tid", &target.tid, "tid",
729 "stat events on existing thread id"),
730 OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
731 "system-wide collection from all CPUs"),
732 OPT_BOOLEAN('g', "group", &group,
733 "put the counters into a counter group"),
734 OPT_BOOLEAN(0, "scale", &stat_config.scale,
735 "Use --no-scale to disable counter scaling for multiplexing"),
736 OPT_INCR('v', "verbose", &verbose,
737 "be more verbose (show counter open errors, etc)"),
738 OPT_INTEGER('r', "repeat", &stat_config.run_count,
739 "repeat command and print average + stddev (max: 100, forever: 0)"),
740 OPT_BOOLEAN(0, "table", &stat_config.walltime_run_table,
741 "display details about each run (only with -r option)"),
742 OPT_BOOLEAN('n', "null", &stat_config.null_run,
743 "null run - dont start any counters"),
744 OPT_INCR('d', "detailed", &detailed_run,
745 "detailed run - start a lot of events"),
746 OPT_BOOLEAN('S', "sync", &sync_run,
747 "call sync() before starting a run"),
748 OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
749 "print large numbers with thousands\' separators",
751 OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
752 "list of cpus to monitor in system-wide"),
753 OPT_SET_UINT('A', "no-aggr", &stat_config.aggr_mode,
754 "disable CPU count aggregation", AGGR_NONE),
755 OPT_BOOLEAN(0, "no-merge", &stat_config.no_merge, "Do not merge identical named events"),
756 OPT_STRING('x', "field-separator", &stat_config.csv_sep, "separator",
757 "print counts with custom separator"),
758 OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
759 "monitor event in cgroup name only", parse_cgroups),
760 OPT_STRING('o', "output", &output_name, "file", "output file name"),
761 OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
762 OPT_INTEGER(0, "log-fd", &output_fd,
763 "log output to fd, instead of stderr"),
764 OPT_STRING(0, "pre", &pre_cmd, "command",
765 "command to run prior to the measured command"),
766 OPT_STRING(0, "post", &post_cmd, "command",
767 "command to run after to the measured command"),
768 OPT_UINTEGER('I', "interval-print", &stat_config.interval,
769 "print counts at regular interval in ms "
770 "(overhead is possible for values <= 100ms)"),
771 OPT_INTEGER(0, "interval-count", &stat_config.times,
772 "print counts for fixed number of times"),
773 OPT_BOOLEAN(0, "interval-clear", &stat_config.interval_clear,
774 "clear screen in between new interval"),
775 OPT_UINTEGER(0, "timeout", &stat_config.timeout,
776 "stop workload and print counts after a timeout period in ms (>= 10ms)"),
777 OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode,
778 "aggregate counts per processor socket", AGGR_SOCKET),
779 OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode,
780 "aggregate counts per physical processor core", AGGR_CORE),
781 OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode,
782 "aggregate counts per thread", AGGR_THREAD),
783 OPT_UINTEGER('D', "delay", &stat_config.initial_delay,
784 "ms to wait before starting measurement after program start"),
785 OPT_CALLBACK_NOOPT(0, "metric-only", &stat_config.metric_only, NULL,
786 "Only print computed metrics. No raw values", enable_metric_only),
787 OPT_BOOLEAN(0, "topdown", &topdown_run,
788 "measure topdown level 1 statistics"),
789 OPT_BOOLEAN(0, "smi-cost", &smi_cost,
791 OPT_CALLBACK('M', "metrics", &evsel_list, "metric/metric group list",
792 "monitor specified metrics or metric groups (separated by ,)",
793 parse_metric_groups),
797 static int perf_stat__get_socket(struct perf_stat_config *config __maybe_unused,
798 struct cpu_map *map, int cpu)
800 return cpu_map__get_socket(map, cpu, NULL);
803 static int perf_stat__get_core(struct perf_stat_config *config __maybe_unused,
804 struct cpu_map *map, int cpu)
806 return cpu_map__get_core(map, cpu, NULL);
809 static int cpu_map__get_max(struct cpu_map *map)
813 for (i = 0; i < map->nr; i++) {
814 if (map->map[i] > max)
821 static int perf_stat__get_aggr(struct perf_stat_config *config,
822 aggr_get_id_t get_id, struct cpu_map *map, int idx)
831 if (config->cpus_aggr_map->map[cpu] == -1)
832 config->cpus_aggr_map->map[cpu] = get_id(config, map, idx);
834 return config->cpus_aggr_map->map[cpu];
837 static int perf_stat__get_socket_cached(struct perf_stat_config *config,
838 struct cpu_map *map, int idx)
840 return perf_stat__get_aggr(config, perf_stat__get_socket, map, idx);
843 static int perf_stat__get_core_cached(struct perf_stat_config *config,
844 struct cpu_map *map, int idx)
846 return perf_stat__get_aggr(config, perf_stat__get_core, map, idx);
849 static bool term_percore_set(void)
851 struct perf_evsel *counter;
853 evlist__for_each_entry(evsel_list, counter) {
854 if (counter->percore)
861 static int perf_stat_init_aggr_mode(void)
865 switch (stat_config.aggr_mode) {
867 if (cpu_map__build_socket_map(evsel_list->cpus, &stat_config.aggr_map)) {
868 perror("cannot build socket map");
871 stat_config.aggr_get_id = perf_stat__get_socket_cached;
874 if (cpu_map__build_core_map(evsel_list->cpus, &stat_config.aggr_map)) {
875 perror("cannot build core map");
878 stat_config.aggr_get_id = perf_stat__get_core_cached;
881 if (term_percore_set()) {
882 if (cpu_map__build_core_map(evsel_list->cpus,
883 &stat_config.aggr_map)) {
884 perror("cannot build core map");
887 stat_config.aggr_get_id = perf_stat__get_core_cached;
898 * The evsel_list->cpus is the base we operate on,
899 * taking the highest cpu number to be the size of
900 * the aggregation translate cpumap.
902 nr = cpu_map__get_max(evsel_list->cpus);
903 stat_config.cpus_aggr_map = cpu_map__empty_new(nr + 1);
904 return stat_config.cpus_aggr_map ? 0 : -ENOMEM;
907 static void perf_stat__exit_aggr_mode(void)
909 cpu_map__put(stat_config.aggr_map);
910 cpu_map__put(stat_config.cpus_aggr_map);
911 stat_config.aggr_map = NULL;
912 stat_config.cpus_aggr_map = NULL;
915 static inline int perf_env__get_cpu(struct perf_env *env, struct cpu_map *map, int idx)
924 if (cpu >= env->nr_cpus_avail)
930 static int perf_env__get_socket(struct cpu_map *map, int idx, void *data)
932 struct perf_env *env = data;
933 int cpu = perf_env__get_cpu(env, map, idx);
935 return cpu == -1 ? -1 : env->cpu[cpu].socket_id;
938 static int perf_env__get_core(struct cpu_map *map, int idx, void *data)
940 struct perf_env *env = data;
941 int core = -1, cpu = perf_env__get_cpu(env, map, idx);
944 int socket_id = env->cpu[cpu].socket_id;
947 * Encode socket in upper 16 bits
948 * core_id is relative to socket, and
949 * we need a global id. So we combine
952 core = (socket_id << 16) | (env->cpu[cpu].core_id & 0xffff);
958 static int perf_env__build_socket_map(struct perf_env *env, struct cpu_map *cpus,
959 struct cpu_map **sockp)
961 return cpu_map__build_map(cpus, sockp, perf_env__get_socket, env);
964 static int perf_env__build_core_map(struct perf_env *env, struct cpu_map *cpus,
965 struct cpu_map **corep)
967 return cpu_map__build_map(cpus, corep, perf_env__get_core, env);
970 static int perf_stat__get_socket_file(struct perf_stat_config *config __maybe_unused,
971 struct cpu_map *map, int idx)
973 return perf_env__get_socket(map, idx, &perf_stat.session->header.env);
976 static int perf_stat__get_core_file(struct perf_stat_config *config __maybe_unused,
977 struct cpu_map *map, int idx)
979 return perf_env__get_core(map, idx, &perf_stat.session->header.env);
982 static int perf_stat_init_aggr_mode_file(struct perf_stat *st)
984 struct perf_env *env = &st->session->header.env;
986 switch (stat_config.aggr_mode) {
988 if (perf_env__build_socket_map(env, evsel_list->cpus, &stat_config.aggr_map)) {
989 perror("cannot build socket map");
992 stat_config.aggr_get_id = perf_stat__get_socket_file;
995 if (perf_env__build_core_map(env, evsel_list->cpus, &stat_config.aggr_map)) {
996 perror("cannot build core map");
999 stat_config.aggr_get_id = perf_stat__get_core_file;
1012 static int topdown_filter_events(const char **attr, char **str, bool use_group)
1019 for (i = 0; attr[i]; i++) {
1020 if (pmu_have_event("cpu", attr[i])) {
1021 len += strlen(attr[i]) + 1;
1022 attr[i - off] = attr[i];
1026 attr[i - off] = NULL;
1028 *str = malloc(len + 1 + 2);
1038 for (i = 0; attr[i]; i++) {
1051 __weak bool arch_topdown_check_group(bool *warn)
1057 __weak void arch_topdown_group_warn(void)
1062 * Add default attributes, if there were no attributes specified or
1063 * if -d/--detailed, -d -d or -d -d -d is used:
1065 static int add_default_attributes(void)
1068 struct perf_event_attr default_attrs0[] = {
1070 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK },
1071 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES },
1072 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS },
1073 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS },
1075 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES },
1077 struct perf_event_attr frontend_attrs[] = {
1078 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
1080 struct perf_event_attr backend_attrs[] = {
1081 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND },
1083 struct perf_event_attr default_attrs1[] = {
1084 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS },
1085 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS },
1086 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES },
1091 * Detailed stats (-d), covering the L1 and last level data caches:
1093 struct perf_event_attr detailed_attrs[] = {
1095 { .type = PERF_TYPE_HW_CACHE,
1097 PERF_COUNT_HW_CACHE_L1D << 0 |
1098 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1099 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1101 { .type = PERF_TYPE_HW_CACHE,
1103 PERF_COUNT_HW_CACHE_L1D << 0 |
1104 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1105 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1107 { .type = PERF_TYPE_HW_CACHE,
1109 PERF_COUNT_HW_CACHE_LL << 0 |
1110 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1111 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1113 { .type = PERF_TYPE_HW_CACHE,
1115 PERF_COUNT_HW_CACHE_LL << 0 |
1116 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1117 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1121 * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1123 struct perf_event_attr very_detailed_attrs[] = {
1125 { .type = PERF_TYPE_HW_CACHE,
1127 PERF_COUNT_HW_CACHE_L1I << 0 |
1128 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1129 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1131 { .type = PERF_TYPE_HW_CACHE,
1133 PERF_COUNT_HW_CACHE_L1I << 0 |
1134 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1135 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1137 { .type = PERF_TYPE_HW_CACHE,
1139 PERF_COUNT_HW_CACHE_DTLB << 0 |
1140 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1141 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1143 { .type = PERF_TYPE_HW_CACHE,
1145 PERF_COUNT_HW_CACHE_DTLB << 0 |
1146 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1147 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1149 { .type = PERF_TYPE_HW_CACHE,
1151 PERF_COUNT_HW_CACHE_ITLB << 0 |
1152 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1153 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1155 { .type = PERF_TYPE_HW_CACHE,
1157 PERF_COUNT_HW_CACHE_ITLB << 0 |
1158 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1159 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1164 * Very, very detailed stats (-d -d -d), adding prefetch events:
1166 struct perf_event_attr very_very_detailed_attrs[] = {
1168 { .type = PERF_TYPE_HW_CACHE,
1170 PERF_COUNT_HW_CACHE_L1D << 0 |
1171 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
1172 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1174 { .type = PERF_TYPE_HW_CACHE,
1176 PERF_COUNT_HW_CACHE_L1D << 0 |
1177 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
1178 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1180 struct parse_events_error errinfo;
1182 /* Set attrs if no event is selected and !null_run: */
1183 if (stat_config.null_run)
1186 if (transaction_run) {
1187 /* Handle -T as -M transaction. Once platform specific metrics
1188 * support has been added to the json files, all archictures
1189 * will use this approach. To determine transaction support
1190 * on an architecture test for such a metric name.
1192 if (metricgroup__has_metric("transaction")) {
1193 struct option opt = { .value = &evsel_list };
1195 return metricgroup__parse_groups(&opt, "transaction",
1196 &stat_config.metric_events);
1199 if (pmu_have_event("cpu", "cycles-ct") &&
1200 pmu_have_event("cpu", "el-start"))
1201 err = parse_events(evsel_list, transaction_attrs,
1204 err = parse_events(evsel_list,
1205 transaction_limited_attrs,
1208 fprintf(stderr, "Cannot set up transaction events\n");
1209 parse_events_print_error(&errinfo, transaction_attrs);
1218 if (sysfs__read_int(FREEZE_ON_SMI_PATH, &smi) < 0) {
1219 fprintf(stderr, "freeze_on_smi is not supported.\n");
1224 if (sysfs__write_int(FREEZE_ON_SMI_PATH, 1) < 0) {
1225 fprintf(stderr, "Failed to set freeze_on_smi.\n");
1231 if (pmu_have_event("msr", "aperf") &&
1232 pmu_have_event("msr", "smi")) {
1233 if (!force_metric_only)
1234 stat_config.metric_only = true;
1235 err = parse_events(evsel_list, smi_cost_attrs, &errinfo);
1237 fprintf(stderr, "To measure SMI cost, it needs "
1238 "msr/aperf/, msr/smi/ and cpu/cycles/ support\n");
1239 parse_events_print_error(&errinfo, smi_cost_attrs);
1243 fprintf(stderr, "Cannot set up SMI cost events\n");
1253 if (stat_config.aggr_mode != AGGR_GLOBAL &&
1254 stat_config.aggr_mode != AGGR_CORE) {
1255 pr_err("top down event configuration requires --per-core mode\n");
1258 stat_config.aggr_mode = AGGR_CORE;
1259 if (nr_cgroups || !target__has_cpu(&target)) {
1260 pr_err("top down event configuration requires system-wide mode (-a)\n");
1264 if (!force_metric_only)
1265 stat_config.metric_only = true;
1266 if (topdown_filter_events(topdown_attrs, &str,
1267 arch_topdown_check_group(&warn)) < 0) {
1268 pr_err("Out of memory\n");
1271 if (topdown_attrs[0] && str) {
1273 arch_topdown_group_warn();
1274 err = parse_events(evsel_list, str, &errinfo);
1277 "Cannot set up top down events %s: %d\n",
1280 parse_events_print_error(&errinfo, str);
1284 fprintf(stderr, "System does not support topdown\n");
1290 if (!evsel_list->nr_entries) {
1291 if (target__has_cpu(&target))
1292 default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK;
1294 if (perf_evlist__add_default_attrs(evsel_list, default_attrs0) < 0)
1296 if (pmu_have_event("cpu", "stalled-cycles-frontend")) {
1297 if (perf_evlist__add_default_attrs(evsel_list,
1298 frontend_attrs) < 0)
1301 if (pmu_have_event("cpu", "stalled-cycles-backend")) {
1302 if (perf_evlist__add_default_attrs(evsel_list,
1306 if (perf_evlist__add_default_attrs(evsel_list, default_attrs1) < 0)
1310 /* Detailed events get appended to the event list: */
1312 if (detailed_run < 1)
1315 /* Append detailed run extra attributes: */
1316 if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1319 if (detailed_run < 2)
1322 /* Append very detailed run extra attributes: */
1323 if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1326 if (detailed_run < 3)
1329 /* Append very, very detailed run extra attributes: */
1330 return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1333 static const char * const stat_record_usage[] = {
1334 "perf stat record [<options>]",
1338 static void init_features(struct perf_session *session)
1342 for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++)
1343 perf_header__set_feat(&session->header, feat);
1345 perf_header__clear_feat(&session->header, HEADER_DIR_FORMAT);
1346 perf_header__clear_feat(&session->header, HEADER_BUILD_ID);
1347 perf_header__clear_feat(&session->header, HEADER_TRACING_DATA);
1348 perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK);
1349 perf_header__clear_feat(&session->header, HEADER_AUXTRACE);
1352 static int __cmd_record(int argc, const char **argv)
1354 struct perf_session *session;
1355 struct perf_data *data = &perf_stat.data;
1357 argc = parse_options(argc, argv, stat_options, stat_record_usage,
1358 PARSE_OPT_STOP_AT_NON_OPTION);
1361 data->path = output_name;
1363 if (stat_config.run_count != 1 || forever) {
1364 pr_err("Cannot use -r option with perf stat record.\n");
1368 session = perf_session__new(data, false, NULL);
1369 if (session == NULL) {
1370 pr_err("Perf session creation failed.\n");
1374 init_features(session);
1376 session->evlist = evsel_list;
1377 perf_stat.session = session;
1378 perf_stat.record = true;
1382 static int process_stat_round_event(struct perf_session *session,
1383 union perf_event *event)
1385 struct stat_round_event *stat_round = &event->stat_round;
1386 struct perf_evsel *counter;
1387 struct timespec tsh, *ts = NULL;
1388 const char **argv = session->header.env.cmdline_argv;
1389 int argc = session->header.env.nr_cmdline;
1391 evlist__for_each_entry(evsel_list, counter)
1392 perf_stat_process_counter(&stat_config, counter);
1394 if (stat_round->type == PERF_STAT_ROUND_TYPE__FINAL)
1395 update_stats(&walltime_nsecs_stats, stat_round->time);
1397 if (stat_config.interval && stat_round->time) {
1398 tsh.tv_sec = stat_round->time / NSEC_PER_SEC;
1399 tsh.tv_nsec = stat_round->time % NSEC_PER_SEC;
1403 print_counters(ts, argc, argv);
1408 int process_stat_config_event(struct perf_session *session,
1409 union perf_event *event)
1411 struct perf_tool *tool = session->tool;
1412 struct perf_stat *st = container_of(tool, struct perf_stat, tool);
1414 perf_event__read_stat_config(&stat_config, &event->stat_config);
1416 if (cpu_map__empty(st->cpus)) {
1417 if (st->aggr_mode != AGGR_UNSET)
1418 pr_warning("warning: processing task data, aggregation mode not set\n");
1422 if (st->aggr_mode != AGGR_UNSET)
1423 stat_config.aggr_mode = st->aggr_mode;
1425 if (perf_stat.data.is_pipe)
1426 perf_stat_init_aggr_mode();
1428 perf_stat_init_aggr_mode_file(st);
1433 static int set_maps(struct perf_stat *st)
1435 if (!st->cpus || !st->threads)
1438 if (WARN_ONCE(st->maps_allocated, "stats double allocation\n"))
1441 perf_evlist__set_maps(evsel_list, st->cpus, st->threads);
1443 if (perf_evlist__alloc_stats(evsel_list, true))
1446 st->maps_allocated = true;
1451 int process_thread_map_event(struct perf_session *session,
1452 union perf_event *event)
1454 struct perf_tool *tool = session->tool;
1455 struct perf_stat *st = container_of(tool, struct perf_stat, tool);
1458 pr_warning("Extra thread map event, ignoring.\n");
1462 st->threads = thread_map__new_event(&event->thread_map);
1466 return set_maps(st);
1470 int process_cpu_map_event(struct perf_session *session,
1471 union perf_event *event)
1473 struct perf_tool *tool = session->tool;
1474 struct perf_stat *st = container_of(tool, struct perf_stat, tool);
1475 struct cpu_map *cpus;
1478 pr_warning("Extra cpu map event, ignoring.\n");
1482 cpus = cpu_map__new_data(&event->cpu_map.data);
1487 return set_maps(st);
1490 static int runtime_stat_new(struct perf_stat_config *config, int nthreads)
1494 config->stats = calloc(nthreads, sizeof(struct runtime_stat));
1498 config->stats_num = nthreads;
1500 for (i = 0; i < nthreads; i++)
1501 runtime_stat__init(&config->stats[i]);
1506 static void runtime_stat_delete(struct perf_stat_config *config)
1513 for (i = 0; i < config->stats_num; i++)
1514 runtime_stat__exit(&config->stats[i]);
1516 free(config->stats);
1519 static const char * const stat_report_usage[] = {
1520 "perf stat report [<options>]",
1524 static struct perf_stat perf_stat = {
1526 .attr = perf_event__process_attr,
1527 .event_update = perf_event__process_event_update,
1528 .thread_map = process_thread_map_event,
1529 .cpu_map = process_cpu_map_event,
1530 .stat_config = process_stat_config_event,
1531 .stat = perf_event__process_stat_event,
1532 .stat_round = process_stat_round_event,
1534 .aggr_mode = AGGR_UNSET,
1537 static int __cmd_report(int argc, const char **argv)
1539 struct perf_session *session;
1540 const struct option options[] = {
1541 OPT_STRING('i', "input", &input_name, "file", "input file name"),
1542 OPT_SET_UINT(0, "per-socket", &perf_stat.aggr_mode,
1543 "aggregate counts per processor socket", AGGR_SOCKET),
1544 OPT_SET_UINT(0, "per-core", &perf_stat.aggr_mode,
1545 "aggregate counts per physical processor core", AGGR_CORE),
1546 OPT_SET_UINT('A', "no-aggr", &perf_stat.aggr_mode,
1547 "disable CPU count aggregation", AGGR_NONE),
1553 argc = parse_options(argc, argv, options, stat_report_usage, 0);
1555 if (!input_name || !strlen(input_name)) {
1556 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
1559 input_name = "perf.data";
1562 perf_stat.data.path = input_name;
1563 perf_stat.data.mode = PERF_DATA_MODE_READ;
1565 session = perf_session__new(&perf_stat.data, false, &perf_stat.tool);
1566 if (session == NULL)
1569 perf_stat.session = session;
1570 stat_config.output = stderr;
1571 evsel_list = session->evlist;
1573 ret = perf_session__process_events(session);
1577 perf_session__delete(session);
1581 static void setup_system_wide(int forks)
1584 * Make system wide (-a) the default target if
1585 * no target was specified and one of following
1586 * conditions is met:
1588 * - there's no workload specified
1589 * - there is workload specified but all requested
1590 * events are system wide events
1592 if (!target__none(&target))
1596 target.system_wide = true;
1598 struct perf_evsel *counter;
1600 evlist__for_each_entry(evsel_list, counter) {
1601 if (!counter->system_wide)
1605 if (evsel_list->nr_entries)
1606 target.system_wide = true;
1610 int cmd_stat(int argc, const char **argv)
1612 const char * const stat_usage[] = {
1613 "perf stat [<options>] [<command>]",
1616 int status = -EINVAL, run_idx;
1618 FILE *output = stderr;
1619 unsigned int interval, timeout;
1620 const char * const stat_subcommands[] = { "record", "report" };
1622 setlocale(LC_ALL, "");
1624 evsel_list = perf_evlist__new();
1625 if (evsel_list == NULL)
1628 parse_events__shrink_config_terms();
1630 /* String-parsing callback-based options would segfault when negated */
1631 set_option_flag(stat_options, 'e', "event", PARSE_OPT_NONEG);
1632 set_option_flag(stat_options, 'M', "metrics", PARSE_OPT_NONEG);
1633 set_option_flag(stat_options, 'G', "cgroup", PARSE_OPT_NONEG);
1635 argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands,
1636 (const char **) stat_usage,
1637 PARSE_OPT_STOP_AT_NON_OPTION);
1638 perf_stat__collect_metric_expr(evsel_list);
1639 perf_stat__init_shadow_stats();
1641 if (stat_config.csv_sep) {
1642 stat_config.csv_output = true;
1643 if (!strcmp(stat_config.csv_sep, "\\t"))
1644 stat_config.csv_sep = "\t";
1646 stat_config.csv_sep = DEFAULT_SEPARATOR;
1648 if (argc && !strncmp(argv[0], "rec", 3)) {
1649 argc = __cmd_record(argc, argv);
1652 } else if (argc && !strncmp(argv[0], "rep", 3))
1653 return __cmd_report(argc, argv);
1655 interval = stat_config.interval;
1656 timeout = stat_config.timeout;
1659 * For record command the -o is already taken care of.
1661 if (!STAT_RECORD && output_name && strcmp(output_name, "-"))
1664 if (output_name && output_fd) {
1665 fprintf(stderr, "cannot use both --output and --log-fd\n");
1666 parse_options_usage(stat_usage, stat_options, "o", 1);
1667 parse_options_usage(NULL, stat_options, "log-fd", 0);
1671 if (stat_config.metric_only && stat_config.aggr_mode == AGGR_THREAD) {
1672 fprintf(stderr, "--metric-only is not supported with --per-thread\n");
1676 if (stat_config.metric_only && stat_config.run_count > 1) {
1677 fprintf(stderr, "--metric-only is not supported with -r\n");
1681 if (stat_config.walltime_run_table && stat_config.run_count <= 1) {
1682 fprintf(stderr, "--table is only supported with -r\n");
1683 parse_options_usage(stat_usage, stat_options, "r", 1);
1684 parse_options_usage(NULL, stat_options, "table", 0);
1688 if (output_fd < 0) {
1689 fprintf(stderr, "argument to --log-fd must be a > 0\n");
1690 parse_options_usage(stat_usage, stat_options, "log-fd", 0);
1696 mode = append_file ? "a" : "w";
1698 output = fopen(output_name, mode);
1700 perror("failed to create output file");
1703 clock_gettime(CLOCK_REALTIME, &tm);
1704 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1705 } else if (output_fd > 0) {
1706 mode = append_file ? "a" : "w";
1707 output = fdopen(output_fd, mode);
1709 perror("Failed opening logfd");
1714 stat_config.output = output;
1717 * let the spreadsheet do the pretty-printing
1719 if (stat_config.csv_output) {
1720 /* User explicitly passed -B? */
1721 if (big_num_opt == 1) {
1722 fprintf(stderr, "-B option not supported with -x\n");
1723 parse_options_usage(stat_usage, stat_options, "B", 1);
1724 parse_options_usage(NULL, stat_options, "x", 1);
1726 } else /* Nope, so disable big number formatting */
1727 stat_config.big_num = false;
1728 } else if (big_num_opt == 0) /* User passed --no-big-num */
1729 stat_config.big_num = false;
1731 setup_system_wide(argc);
1734 * Display user/system times only for single
1735 * run and when there's specified tracee.
1737 if ((stat_config.run_count == 1) && target__none(&target))
1738 stat_config.ru_display = true;
1740 if (stat_config.run_count < 0) {
1741 pr_err("Run count must be a positive number\n");
1742 parse_options_usage(stat_usage, stat_options, "r", 1);
1744 } else if (stat_config.run_count == 0) {
1746 stat_config.run_count = 1;
1749 if (stat_config.walltime_run_table) {
1750 stat_config.walltime_run = zalloc(stat_config.run_count * sizeof(stat_config.walltime_run[0]));
1751 if (!stat_config.walltime_run) {
1752 pr_err("failed to setup -r option");
1757 if ((stat_config.aggr_mode == AGGR_THREAD) &&
1758 !target__has_task(&target)) {
1759 if (!target.system_wide || target.cpu_list) {
1760 fprintf(stderr, "The --per-thread option is only "
1761 "available when monitoring via -p -t -a "
1762 "options or only --per-thread.\n");
1763 parse_options_usage(NULL, stat_options, "p", 1);
1764 parse_options_usage(NULL, stat_options, "t", 1);
1770 * no_aggr, cgroup are for system-wide only
1771 * --per-thread is aggregated per thread, we dont mix it with cpu mode
1773 if (((stat_config.aggr_mode != AGGR_GLOBAL &&
1774 stat_config.aggr_mode != AGGR_THREAD) || nr_cgroups) &&
1775 !target__has_cpu(&target)) {
1776 fprintf(stderr, "both cgroup and no-aggregation "
1777 "modes only available in system-wide mode\n");
1779 parse_options_usage(stat_usage, stat_options, "G", 1);
1780 parse_options_usage(NULL, stat_options, "A", 1);
1781 parse_options_usage(NULL, stat_options, "a", 1);
1785 if (add_default_attributes())
1788 target__validate(&target);
1790 if ((stat_config.aggr_mode == AGGR_THREAD) && (target.system_wide))
1791 target.per_thread = true;
1793 if (perf_evlist__create_maps(evsel_list, &target) < 0) {
1794 if (target__has_task(&target)) {
1795 pr_err("Problems finding threads of monitor\n");
1796 parse_options_usage(stat_usage, stat_options, "p", 1);
1797 parse_options_usage(NULL, stat_options, "t", 1);
1798 } else if (target__has_cpu(&target)) {
1799 perror("failed to parse CPUs map");
1800 parse_options_usage(stat_usage, stat_options, "C", 1);
1801 parse_options_usage(NULL, stat_options, "a", 1);
1807 * Initialize thread_map with comm names,
1808 * so we could print it out on output.
1810 if (stat_config.aggr_mode == AGGR_THREAD) {
1811 thread_map__read_comms(evsel_list->threads);
1812 if (target.system_wide) {
1813 if (runtime_stat_new(&stat_config,
1814 thread_map__nr(evsel_list->threads))) {
1820 if (stat_config.times && interval)
1821 interval_count = true;
1822 else if (stat_config.times && !interval) {
1823 pr_err("interval-count option should be used together with "
1824 "interval-print.\n");
1825 parse_options_usage(stat_usage, stat_options, "interval-count", 0);
1826 parse_options_usage(stat_usage, stat_options, "I", 1);
1830 if (timeout && timeout < 100) {
1832 pr_err("timeout must be >= 10ms.\n");
1833 parse_options_usage(stat_usage, stat_options, "timeout", 0);
1836 pr_warning("timeout < 100ms. "
1837 "The overhead percentage could be high in some cases. "
1838 "Please proceed with caution.\n");
1840 if (timeout && interval) {
1841 pr_err("timeout option is not supported with interval-print.\n");
1842 parse_options_usage(stat_usage, stat_options, "timeout", 0);
1843 parse_options_usage(stat_usage, stat_options, "I", 1);
1847 if (perf_evlist__alloc_stats(evsel_list, interval))
1850 if (perf_stat_init_aggr_mode())
1854 * Set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless
1855 * while avoiding that older tools show confusing messages.
1857 * However for pipe sessions we need to keep it zero,
1858 * because script's perf_evsel__check_attr is triggered
1859 * by attr->sample_type != 0, and we can't run it on
1862 stat_config.identifier = !(STAT_RECORD && perf_stat.data.is_pipe);
1865 * We dont want to block the signals - that would cause
1866 * child tasks to inherit that and Ctrl-C would not work.
1867 * What we want is for Ctrl-C to work in the exec()-ed
1868 * task, but being ignored by perf stat itself:
1872 signal(SIGINT, skip_signal);
1873 signal(SIGCHLD, skip_signal);
1874 signal(SIGALRM, skip_signal);
1875 signal(SIGABRT, skip_signal);
1878 for (run_idx = 0; forever || run_idx < stat_config.run_count; run_idx++) {
1879 if (stat_config.run_count != 1 && verbose > 0)
1880 fprintf(output, "[ perf stat: executing run #%d ... ]\n",
1883 status = run_perf_stat(argc, argv, run_idx);
1884 if (forever && status != -1) {
1885 print_counters(NULL, argc, argv);
1886 perf_stat__reset_stats();
1890 if (!forever && status != -1 && !interval)
1891 print_counters(NULL, argc, argv);
1895 * We synthesize the kernel mmap record just so that older tools
1896 * don't emit warnings about not being able to resolve symbols
1897 * due to /proc/sys/kernel/kptr_restrict settings and instear provide
1898 * a saner message about no samples being in the perf.data file.
1900 * This also serves to suppress a warning about f_header.data.size == 0
1901 * in header.c at the moment 'perf stat record' gets introduced, which
1902 * is not really needed once we start adding the stat specific PERF_RECORD_
1903 * records, but the need to suppress the kptr_restrict messages in older
1904 * tools remain -acme
1906 int fd = perf_data__fd(&perf_stat.data);
1907 int err = perf_event__synthesize_kernel_mmap((void *)&perf_stat,
1908 process_synthesized_event,
1909 &perf_stat.session->machines.host);
1911 pr_warning("Couldn't synthesize the kernel mmap record, harmless, "
1912 "older tools may produce warnings about this file\n.");
1916 if (WRITE_STAT_ROUND_EVENT(walltime_nsecs_stats.max, FINAL))
1917 pr_err("failed to write stat round event\n");
1920 if (!perf_stat.data.is_pipe) {
1921 perf_stat.session->header.data_size += perf_stat.bytes_written;
1922 perf_session__write_header(perf_stat.session, evsel_list, fd, true);
1925 perf_session__delete(perf_stat.session);
1928 perf_stat__exit_aggr_mode();
1929 perf_evlist__free_stats(evsel_list);
1931 free(stat_config.walltime_run);
1933 if (smi_cost && smi_reset)
1934 sysfs__write_int(FREEZE_ON_SMI_PATH, 0);
1936 perf_evlist__delete(evsel_list);
1938 runtime_stat_delete(&stat_config);